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EPUB to MOBI converter

Convert EPUB files to MOBI on Windows 10 and 11: free, offline and in batches. Drag the files onto MOBI in Filee's format donut and the MOBI files appear next to the originals.

Free download How it works

How to convert EPUB to MOBI on Windows

  1. 1

    Select your EPUB files

    In File Explorer or on the desktop, select one EPUB file or as many as you like. The first time, Filee offers to download Calibre, the free engine it uses for this conversion.

  2. 2

    Hold Ctrl and drag

    Hold Ctrl (or the key you set in Filee) and drag the files. A donut of formats opens at the cursor. Prefer menus? Right-click and choose Convert with Filee.

  3. 3

    Drop on MOBI

    Release the files over MOBI. A progress ring counts up, and each MOBI file is saved next to its original.

What Filee does for EPUB → MOBI

The e-book tool Calibre writes the MOBI and AZW3 files. Current Kindles also accept EPUB through Send to Kindle, so MOBI is mainly useful for older Kindle devices and apps.

  • Uses Calibre, a free optional engine that Filee downloads once into its own folder. If Calibre is already on your PC, Filee uses it and nothing is downloaded.
  • Works with DRM-free books only.
  • Batch: one file or hundreds, converted in parallel; a failure never stops the rest.
  • Private: files are converted on your PC and never uploaded, even without internet.
  • Saved next to the original, or in a folder and with a file name pattern you choose.

EPUB can also become

  • HWP
  • PDF
  • DOCX
  • TXT
  • HTML
  • HWPX
  • KEPUB
  • AZW3

About EPUB and MOBI

EPUB

EPUB e-book

EPUB is the open standard for e-books. Text reflows to fit any screen, and most e-readers and reading apps support it; Kindle accepts EPUB through Send to Kindle.

Extensions: .epub

All e-books and comics formats

MOBI

Kindle / Mobipocket e-book

MOBI is the older Mobipocket e-book format that Amazon Kindle used for years. It is still common in older e-book collections, but Amazon has moved to AZW3/KFX and EPUB.

Extensions: .mobi

All e-books and comics formats

Convert EPUB to MOBI for free

Filee is a free, open-source file converter for Windows 10 and 11. It works offline and converts 240+ formats with one drag and drop.

Free download

macOS and Linux are previews.

All releases Source code

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